Wpf DataGridCheckBoxColumn 问题

使用DataGridCheckBoxColumn binding一个布尔属性时，发现无法checkbox无法勾选，并且HeaderTemplate中的checkbox无法获取到viewmodel的IsSelectAll属性，

最后通过下列方式解决。注意放大的部分

<DataGridCheckBoxColumn

                   x:Name="checkColumn"

                   Width=""

                   Binding="{Binding Path=IsSelected, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

                   CanUserSort="False"

                   IsReadOnly="False">

                    <DataGridCheckBoxColumn.ElementStyle>

                        <Style  TargetType="CheckBox" />

                    </DataGridCheckBoxColumn.ElementStyle>

                    <DataGridCheckBoxColumn.HeaderTemplate>

                        <DataTemplate>

                            <CheckBox IsChecked="{Binding Path=DataContext.IsSelectAll, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGrid}}}" />

                        </DataTemplate>

                    </DataGridCheckBoxColumn.HeaderTemplate>

                </DataGridCheckBoxColumn>

方案二：

通过资源绑定

 public class BindingProxy : Freezable

    {

        #region Overrides of Freezable

        protected override Freezable CreateInstanceCore()

        {

            return new BindingProxy();

        }

        #endregion

        public object Data

        {

            get { return (object)GetValue(DataProperty); }

            set { SetValue(DataProperty, value); }

        }

        // Using a DependencyProperty as the backing store for Data.  This enables animation, styling, binding, etc...

        public static readonly DependencyProperty DataProperty =

            DependencyProperty.Register("Data", typeof(object), typeof(BindingProxy), new UIPropertyMetadata(null));

    }

添加资源
 <wpf:BindingProxy x:Key="proxy" Data="{Binding}" />

 <DataGridTemplateColumn  Visibility="{Binding Data.CanChooseMorePatients,Source={StaticResource proxy}, UpdateSourceTrigger=PropertyChanged, Converter={StaticResource  CollapsedConverter}}" >

                        <DataGridTemplateColumn.Header>

                            <CheckBox IsChecked="{Binding Path=Data.IsAllPatientSelected,UpdateSourceTrigger=PropertyChanged, Source={StaticResource proxy} }" />

                        </DataGridTemplateColumn.Header>

                        <DataGridTemplateColumn.CellTemplate>

                            <DataTemplate>

                                <CheckBox IsChecked="{Binding IsPatientSelected,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}"  wpf:CheckboxHelper.PreMouseLeftButtonDownCommand="{Binding CheckedClickCommand}"  />

                            </DataTemplate>

                        </DataGridTemplateColumn.CellTemplate>

  </DataGridTemplateColumn>

巴特西

Wpf DataGridCheckBoxColumn 问题

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